Photos of the Long Island Sound

Research & Monitoring

Status and Trends: LISS Environmental Indicators

Industrial Chemical Discharges (TRI data – CT, NY and Upper watershed)

Industrial Chemical Discharges (CT, NY and upper watershed states)
Total On-Site Releases, CT and NY* (millions of pounds) Surface Water Discharges, CT and NY (millions of pounds)
1988 35.145140 6.086450
1989 28.295206 4.758350
1990 23.190682 4.016130
1991 21.825380 3.906330
1992 18.222353 3.070790
1993 14.190793 2.347560
1994 11.625295 2.229990
1995 9.110131 1.490960
1996 7.487323 0.659290
1997 7.206303 0.671470
1998 5.687147 0.600930
1999 5.980331 1.013122
2000 7.938990 0.816719
2001 7.109360 0.785849
2002 5.708990 0.756887
2003 5.371430 0.731102
2004 4.751040 0.470025
2005 4.507312 0.473471
2006 3.969591 0.504173
2007 3.538951 0.442516
2008 2.727167 0.253150
2009 2.365252 0.310493
2010 1.707712 0.300582
On-Site Disposal or Other Releases (millions of pounds)
Land Water Air
1988 0.754122 1.967225 13.800186
1989 0.102368 0.42113 12.036872
1990 0.072972 0.413017 9.94734
1991 0.002717 0.345765 5.848666
1992 0.138976 0.2766 7.210335
1993 0.498849 0.33819 5.73307
1994 0.111303 0.230125 5.171201
1995 0.113504 1.249427 4.432172
1996 0.058551 0.673917 2.804847
1997 0.03608 0.925854 3.420664
1998 0.042207 0.764955 6.430061
1999 0.012150 0.716022 5.914032
2000 0.051711 0.479901 5.156229
2001 0.010245 0.488665 6.641898
2002 0.008293 0.514859 5.467827
2003 0.112770 0.646595 6.527346
2004 0.061009 0.432692 5.470965
2005 0.036368 0.330646 5.146791
2006 0.020636 0.455288 4.219420
2007 0.059806 0.392541 3.988944
2008 0.024120 0.175548 3.228193
2009 0.021313 0.175956 2.781267
2010 0.084077 0.164110 1.883962
2011 .037994 .117733 1.538018
2012 .010926 .137904 1.226027
2013 .002303 .138574 1.732183
2014 .001926 .064865 1.760434
2015 .002826 .054899 1.306535

WHAT ARE INDUSTRIAL CHEMICAL DISCHARGES?

The EPA maintains the Toxics Release Inventory (TRI), a national database that identifies more than 600 designated toxic chemicals manufactured and used at industrial facilities and the annual amounts of these chemicals released as waste.

WHAT DOES THIS INDICATE?

The decline in industrial chemical discharges indicates progress in reducing the release of contaminants into Long Island Sound’s watershed.

STATUS

Toxic releases in the Sound’s watershed have declined by more than 90 percent since the late 1980s. This is consistent with trends in toxic releases throughout the country. Facilities releasing industrial chemicals have been improved with better emissions-reducing technology.  There has also been an increase in the national awareness of the harmful effects of toxic releases. Air emissions account for the majority of on-site releases.

DATA NOTE

*Total on-site releases include air emissions, other on-site land releases, and surface water discharges.

Subscribe to receive our e-newsletter, Sound Bytes by providing your email address. Interested in a free copy of our print newsletter, Sound Update? Then also provide your home/company/school address.